1.
He cheated the old woman of her money by making her sign a paper she didn't understand.
他叫那位老太太在不知底细的文件上签了字，骗走了她的钱。
2.
How simple it is when one knows nothing.
不知道底细，那说说多容易
3.
Henry thinks nothing is known about him, but I am told that the authorities have him taped.
亨利以为谁也不知道他的情况，但我听说当局已摸清了他的底细了。
4.
Perhaps they were searching for morsels of food on the stream-bed; or maybe they sought the chill cold of the deep water.
不知是在寻找沟底的细微食物，还是贪那深深的水里的寒冷。
5.
In any case no-one knew anything about him
谁也不知道他的底蕴。
6.
"However, winning as his appearance was, it was difficult to tell what lay beneath."
"看其外貌最是极好,却难知其底细."
7.
Moreover, the Chinese cannot easily give out the details of their own rocket design. How can the Americans who don't know the ins and outs of the thing give any guidance?
况且中国人的火箭设计细节，当然也不能轻易向外人泄漏，美国人不知底里，又如何指点？
8.
He stared at me without a word, and I knew I had guessed right about those missing hours.
他一言不发地瞪着我，于是我知道我当时对于不明底细的那几个小时的猜测果然是猜对了。
9.
She was not at all sure whether Wang, the maid, was reliable.
不知王妈到底可靠不可靠；
10.
"He goes by the name of Smith, but I don't know who he really is."
他名叫史密斯，但我不知道他到底是谁。
11.
Someone had cut a hole in the bottom of the bag and sugar was trickling out over the floor.
不知是谁把包底捅了个洞，糖漏了满地。
12.
But the true extent may never be known.
但是监听的范围到底有多大不得而知。
13.
The three disciples ran after the spirit who knew he was no match for them and did not come out.
三个徒弟追到河底,妖怪自知不是对手,闭门不出。
14.
No big talk with me, I have your number.
别跟我瞎吹了，我又不是不了解你的底细。
15.
Fundic gland of the abomasum consists primarily of chief cells and parietal cells, but neck mucous cells are few and not clear.
皱胃的胃底腺主要是主细胞和壁细胞,颈粘液细胞数量少而不明显。
16.
They wondered whether the brigade could carry such a bold scheme through.
他们不知道这一大胆计划大队能否执行到底。
17.
People don't know how much he's got salted away.
别人还不知道他到底偷偷捞了多少钱哩。
18.
I don't know what all the trouble is about,but I'm sure it must be your fault..
我不知道到底有什么麻烦﹖，但我确信错都在你